Vastus medialis
Vastus Medialis
Vastus medialis (pronunciation: /ˈvæstəs mɪˈdaɪəlɪs/) is one of the four muscles in the quadriceps group, located in the anterior compartment of the thigh.
Etymology
The term "vastus" is derived from the Latin word for "huge" or "vast", referring to the size of the muscle group. "Medialis" is Latin for "middle", indicating the muscle's position on the inner side of the thigh.
Anatomy
The vastus medialis originates from the lower part of the inter-trochanteric line and the medial lip of the linea aspera. It inserts into the patella via the quadriceps tendon and the patellar ligament, which attaches to the tibial tuberosity.
Function
The primary function of the vastus medialis is to extend the knee joint. It also plays a crucial role in stabilizing the patella and controlling its tracking during knee flexion and extension.
Related Terms
- Vastus Lateralis: The largest and most powerful part of the quadriceps, located on the outer side of the thigh.
- Vastus Intermedius: The deepest part of the quadriceps, located beneath the vastus lateralis and vastus medialis.
- Rectus Femoris: The only muscle of the quadriceps group that crosses the hip joint, contributing to hip flexion and knee extension.
See Also
External links
- Medical encyclopedia article on Vastus medialis
- Wikipedia's article - Vastus medialis
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